The Wolf-Rayet stars in M 31 - I. Analysis of the late-type WN stars

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Table 1

Fundamental parameters of the WNh model grids.

Parameter	WNh grids

X _H	50%	35%	20%
X _He	48%	63%	78%
X _C	0.01%
X _N	1.5%
X _Fe ^a	0.14%
T_∗/ kK	18..45
R_t/ R_⊙	4..100
log L/L_⊙	5.3
ν_∞/km s^-1	500/1000^b
D	4

Notes.

^(a)

Generic element, including the iron group elements Fe, Sc, Ti, V, Cr, Mn, Co, and Ni. See Gräfener et al. (2002) for relative abundances.

^(b)

Standard models in the whole parameter range were available with 500 and 1000 km s^-1. For certain stars, additional models with especially adjusted (often lower) values were calculated.

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